Please solve this question.
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Answer:
sorry I didn't know that
Answered by
1
Answer:
(377+168√5)/(14+6√5)
Step-by-step explanation:
a² = (3+√5)² = 9+5+6√5 = 14+6√5
So, a² + 1/a² = (14+6√5) + 1/(14+6√5)
= ((14+6√5)²+1)/(14+6√5)
= (196+180+168√5+1)/(14+6√5)
= (377+168√5)/(14+6√5)
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